モデル内で_pathとか_urlとかでURLを作成する config/routes.rb ------------------------------------------------------------------ Rememo::Application.routes.draw do match "user/:id", :controller => "user", :action => :index, :as => :user end ------------------------------------------------------------------ config/environments/production.rb ------------------------------------------------------------------ Rails.application.routes.default_url_options[:host]= 'rememo.jb-jk.net' ------------------------------------------------------------------ app/models/user.rb ------------------------------------------------------------------ class User < ActiveRecord::Base def profile_url Rails.application.routes.url_helpers.user_url(self.id) end end ------------------------------------------------------------------